in alkaline medium. A series of 2-aryl/alkyl-2,3-dihydro-1H-naphtho[1,2-e][1,3]oxazines were synthesized by the one-pot pseudo three-component reaction of β-naphthol, formaldehyde and various amines using nano-Fe3O4@walnut shell/Cu(II) at 60 °C under solvent-free conditions. The catalyst was removed from the reaction mixture by an external magnet and was reusable several times without any considerable
在碱性介质中,将CuCl 2添加到Fe 3 O 4 @核桃壳/Cu( II )中,制备了一种环保型
生物基磁性纳米催化剂Fe 3 O 4 @核桃壳/Cu(II)。采用β-
萘酚、
甲醛的一锅拟三组分反应合成了一系列2-芳基/烷基-2,3-二氢-1H-
萘并[1,2- e ][1,3]恶嗪和各种胺,使用纳米Fe 3 O 4 @核桃壳/Cu( II ) 在60 °C、无溶剂条件下。通过外部磁
铁将催化剂从反应混合物中除去,并可重复使用多次,其活性没有任何明显损失。该方案具有产率高、反应时间短、程序清洁方便、后处理简单以及使用环保催化剂等优点。